1970
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3564
- Proper Divisor Sum (Aliquot Sum)
- 1594
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 784
- Möbius Function
- -1
- Radical
- 1970
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 24
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of alkyls Y^{II} C_n H_{2n+2} with n carbon atoms.at n=10A000646
- Numbers that are the sum of 10 positive 6th powers.at n=29A003366
- Representation degeneracies for Ramond strings.at n=12A005305
- Number of cyclically-5-connected planar trivalent graphs with 2n nodes.at n=11A006791
- McKay-Thompson series of class 6D for Monster.at n=12A007257
- Coordination sequence T2 for Zeolite Code AFS.at n=34A008024
- Coordination sequence T2 for Zeolite Code BPH.at n=34A008056
- Coordination sequence T2 for Zeolite Code BRE.at n=29A008059
- Coordination sequence for 5-dimensional cubic lattice.at n=6A008413
- Molien series for A_4.at n=50A008627
- Coordination sequence T2 for Zeolite Code DFO.at n=34A009876
- Numbers k such that the continued fraction for sqrt(k) has period 5.at n=42A010337
- 2^(n-1) - n*(n+1)/2.at n=11A014846
- Coordination sequence T3 for Zeolite Code CZP.at n=29A019458
- Coordination sequence for C_5 lattice.at n=3A019561
- Numbers k such that Fibonacci(k) == -55 (mod k).at n=37A023170
- a(n) = (d(n)-r(n))/2, where d = A026043 and r is the periodic sequence with fundamental period (1,1,0,0).at n=19A026044
- a(n) = Sum_{k=0..n} T(n,k) * T(n,2n-k), with T given by A027052.at n=7A027073
- Numbers k such that 169*2^k+1 is prime.at n=13A032461
- Number of partitions of n into parts 5k or 5k+1.at n=59A035367